Tread-operated circuit closer



Nov. 9,1926. 1,606,678

J. YON MARSOVSZKY TREAD OPEKTLD CIRCUIT CLOSER Filed Nov. 2g.' 192.4

Patented Nov. 9, 1926.

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JnNo voN MARsovszKY,

OF BUDAPEST, HUNGARY.

TREAD-P-ERATED CICUIT CLOSER.

Application tiled Noveniber 21, 1924, Serial No. 751,225, -and Lin Hungary January 31, 192.

device formingthe subject of the present application gives, on the contrary, upon a single pressure. o the foot. a

of its simple construction very cheap t0 produce.

ln the drawing is shown an example of` the subject of the invention, in which Figure l is a side View of the signalling device, Fig. 2 is similarly a side view-somewhat enlarged and 'in which one side of the casing is removed, and Fig. El shows schematically the general arrangement of the signalling dei-icc and connections.

One part ot' the signalling; apparatus.Y which is adapted to be operated by the foot pressure, is placed upon the-floor in the locality where it is anticipated that an emergenc will arise. This part of the a paratus 1s enclosed within a casing a. nside this casing is arranged a switch d provided with contacts li, c and having fixed to one end of a switch arm f a weight li suspended from a cord g', The end of the switch arm so is provided with a downwardly projecting ook ,11. Upon a pin i also within the casing is rotatably mounted a lever comprisingr two arms j, 7s. arms are lient to hook-shape, whereby the hoop 72 of the. .switch arin f, can be engaged with the hooked end of the lever arm and the hook-shaped end of the arin k lies within the fork n of a rod m which passes o ut through an opening Z situated in the front wall of the casing' a and is under the 'influence of a spring q. rlhe electric leads passingr fi'omthc switch (l lead into a neighbourin;rv room, or into the strcet'or other. desired place where assistance may he waiting, and

4L at this place nn electric alarinliell 0 is oonnecicd in the circuit.

The device works -as follows:

()n open switch, the hooked end 7 of switchai'in 7" engages the hooked end of thc arm j, so that the contacts o, c of the switch (l do not rest in. contact and the circuit oi' the. .hell 0 :s broken. 1f now a. mishap oc.- currcd to a person in the locality equipped continuous b ell' alarm in another place and is in consequencewhereby the switch arm The. ends of the lever.

with the signal device, the rod m situated adjacent the floor must be trodden upon or ar. object let fall thereon, which object may be the body of the person in ditiiculty. The rod is thus set in motion, and Athe devicequickly operates, whereupon the alarm apparatus will soundcontinuously until it 1s 6U switched oli. Upon the downward pressure ot the rodL m the lever c, turns on tlies pin i in the direction of the arrow Fig. 2

becomes free and' is pressed downwardly in the direction olithe other arrow by the. weight h, whereupon the rod m is quickly returned to its original position under the operation of spring o. The contacts Zi, c now rest upon one another, the velectric circuit is completed and the bell o gives a continuous alarm signal. When the danger is over the end of the switch arm 'f is drawn up by pulling down the cord g, whereupon the hook p comes adjacent the hook of the arm j and engages therewithl' A switch is once more in open position.

Instead of a. weightjo hung by a cord g a spring may also be provided which tends to press the arm f downwardly and whichv operates when the end of the arm f releases from ,the arm The main a vantage of the apparatus is that it may be o erated without being noticed by an assai ant or other personwho might otherwise 'prevent a signal being given.

I claiinl. Tread operated switch foran electric alarm circuit comprising a tread operated rod, a pivotal switch arin, a two armed lever'one arm of which engages the operating rod and the other arm having a releasable catch engagement with the switch arm'when the lattcris in open position, switch contacts carried by the switch arm, co-operating contacts positioned beneath said switch ai'in, and n weight carried by the switch arm so that when thc latter falls on being released by the operation of the rod the ,tivo sets-of contacts are' securely electrically 100 closed. for the purpose set forth. v

2. Tread operated switch "for an electric :alarm circuit, comprising; a casing, a tread operated rod having a forked end passing into arid rcsiiliently supported in said cas- OS ing, a switch arm pivotally mounted in saidcasng, a; two farmed ever pvotully moune'd in said casing and` having reeas able catcn engagement with the swxtch arm when the latter is in open position, switch contacis carried by the switch arm, c0-0p erst-ing font-acts fstozed 'beneath said awitch arm, a. Wegnt-cryed by the switch momma 'arm 'so that when the latt'er is released by the operationo the rod the two sets of contacts will be forced into`secu1je' electrical engagcment, and resetting means abtached lto the' switch arm and passing through the casing, for the urpose Set forth. JEN VON MABSOVSZKY. 

